WO2022151498A1

WO2022151498A1 - Combustion organization method for solid fuel, and combustion furnace

Info

Publication number: WO2022151498A1
Application number: PCT/CN2021/072563
Authority: WO
Inventors: 车战斌
Original assignee: 车战斌
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2022-07-21
Also published as: CN115119516A

Abstract

A combustion organization method for a solid fuel, and a combustion furnace. A combustion organization method for a solid fuel comprises: by means of a first slope formed by a material splitting structure provided below a feed port (42) of a combustion furnace, providing a guidance force for downward movement of a solid fuel, so as to enable the solid fuel to move along the first slope; by means of a first material passing gap (31) of the material splitting structure, screening, according to the volume, the solid fuel entering a combustion furnace, so as to allow the solid fuel, the volume of which is greater than that of the first material passing gap (31), to move along the first slope, and allow the solid fuel, the volume of which is less than that of the first material passing gap (31), to fall through the first material passing gap, so that the solid fuel is subjected to an organized combustion in a manner of heat absorption and cracking above the material splitting structure, and combustion and heat release below the material splitting structure. The method can achieve an organized combustion of solid fuels.

Description

Combustion organization method of solid fuel and combustion furnace

technical field

The embodiments of the present application relate to the field of combustion equipment, and in particular, to a combustion organization method of solid fuel and a combustion furnace.

Background technique

With the rapid development of biomass, waste, sludge and other solid waste treatment and power generation technologies in recent years, as well as low-quality solid fuel power generation technologies such as lignite, combustion equipment, such as boilers, as an important component in thermal power generation systems, its application increasingly widespread. The existing combustion equipment, such as the spread-firing combustion furnace using the discharge conveying mechanism, has disadvantages such as complex structure, high processing and production cost, poor stability in use, and insufficient fuel combustion. In addition, in order to achieve sufficient oxygen supply for fuel in the prior art, in a spread-firing combustion furnace that uses a discharge conveying mechanism to carry fuel, fuel is accumulated on the discharge conveying mechanism for combustion, and the thickness of the fuel cannot be too thick, otherwise it is easy to cause local The fuel is not fully burned, while the other part is easily overburned, resulting in waste of resources and pollution. However, the spread-fired combustion furnace with this structure often encounters problems such as flame failure and burnout during the working process, which requires real-time inspection and maintenance by staff, which makes the use cost remain high.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned problems, the embodiments of the present application provide a solid fuel combustion organization method and a combustion furnace, so as to at least partially solve the above-mentioned problems.

According to a first aspect of the embodiments of the present application, there is provided a method for the combustion organization of solid fuel, comprising: providing a downward-moving surface for solid fuel through a first slope formed by a material distribution structure disposed below a feed port of a combustion furnace. The guiding force makes the solid fuel move along the first inclined plane; the solid fuel entering the combustion furnace is screened according to the volume through the first material passing gap of the material distribution structure, so that the solid fuel whose volume is larger than the first material passing gap will follow the first feeding gap. The inclined plane moves, and the solid fuel whose volume is smaller than the first material passing gap is dropped through the first material passing gap, so that the solid fuel is organized in the way of endothermic cracking above the material distribution structure, and burning and releasing heat under the material distribution structure. combustion.

Optionally, the material distribution structure divides the furnace body of the combustion furnace into a cracking area, a fixed carbon combustion area and an anoxic combustion area, the cracking area is located above the first inclined plane, and the fixed carbon combustion area and the anoxic combustion area are located below the first inclined plane. .

Optionally, the combustion furnace further includes a discharge conveying mechanism, and the material distribution structure includes a first arm group for forming a first inclined plane and a second arm group for forming a second inclined plane. In order to form the cracking area, the second arm group is located between the first arm group and the discharge conveying mechanism, and a fixed carbon combustion zone is formed between the first arm group and the second arm group, and the second arm group is located in the second arm group. An oxygen-deficient combustion zone is formed between it and the discharge conveying mechanism.

According to another aspect of the present application, a solid fuel combustion furnace is provided, comprising: a furnace body, a feeding port is provided on the top wall of the furnace body, and an air inlet is provided on the upper part of the air inlet side wall of the furnace body; a material distribution structure , the material distribution structure includes a first support arm group forming a first inclined plane, the first support arm group is arranged below the feeding port, and is used to accept the solid fuel entering the furnace body from the feeding port. The first included angle, the first included angle is smaller than the stacking slope of the fuel pile formed by the solid fuel stacking on the first arm group, and the first support arm group is provided with a first material passing gap, so that the solid fuel can pass through the first arm group. A material passing gap falls; and a discharge conveying mechanism, which is arranged at the bottom of the furnace body, is used to carry the solid fuel dropped from the material distribution structure, and discharges the combustion residue of the combustion furnace out of the furnace body.

Optionally, the top wall of the furnace body is also provided with a first inlet for entering the first supplementary fuel whose bulk density is less than or equal to the first set value, and the distance between the first inlet and the air inlet is smaller than the distance between the feeding port and the air inlet. distance.

Optionally, the top wall of the furnace body is also provided with a second inlet for entering the second supplementary fuel with a volume greater than the first set value, and the distance between the second inlet and the air inlet is greater than the distance between the feeding port and the air inlet. .

Optionally, the second supplementary fuel with a volume greater than the first set value includes sludge, and the combustion furnace further includes a screw pusher, the screw pusher is fixed on the top wall of the furnace body, and the screw pusher includes sludge. The sludge outlet is arranged above the second inlet, so that the second inlet receives the sludge discharged from the sludge outlet.

Optionally, the combustion furnace further includes an exhaust passage and an air outlet for discharging the gas generated by the combustion of the solid fuel, the air outlet is located at the end of the exhaust passage, and the height of the air outlet is lower than that of the air inlet.

Optionally, the furnace body is further provided with a heat storage device for storing heat generated by the combustion of the solid fuel, and the heat storage device is used to form a temperature field in the exhaust passage with a temperature of 800°C to 1150°C.

Optionally, the material distribution structure also includes a second support arm group for forming the second inclined plane, the second support arm group is located between the first support arm group and the discharge conveying mechanism, and the second support arm group has a second pass. The width of the second feeding gap is smaller than the width of the first feeding gap.

Optionally, the combustion furnace also includes a third arm group, the number of the third arm group is multiple, and each third arm group has a third material passing gap, along the discharging direction of the discharging conveying mechanism, The third material passing gaps of the plurality of third arm groups are gradually reduced.

Optionally, there is a discharging distance between the second end of the second arm group and the discharging conveying mechanism, and the discharging distance is negatively correlated with the specific gravity of volatile matter in the combustion residue in the furnace body.

In the embodiment of the present application, by setting the material distribution structure in the combustion furnace, the first inclined surface and the first material passing gap of the material distribution structure can be used to guide and sort the solid fuel. At the same time, when the solid fuel is burned in the furnace body The natural law of , so that the solid fuel can satisfy the temperature field process in the furnace chamber of the combustion furnace, so as to realize the full combustion of the solid fuel. The process of solid fuel satisfying the temperature field in the furnace hearth is as follows: the spatial distribution of different temperature regions in the furnace hearth meets the temperature conditions required for different combustion stages of solid fuel. Forming.

Description of drawings

The following drawings are only intended to illustrate and explain the present application schematically, and do not limit the scope of the present application.

FIG. 1 shows a schematic structural diagram of a combustion furnace according to an embodiment of the present application;

FIG. 2 shows a schematic structural diagram of another combustion furnace according to an embodiment of the present application;

FIG. 3 shows a schematic three-dimensional structure diagram from a first perspective of a material distribution structure of a combustion furnace according to another embodiment of the present application;

Fig. 4 shows a second perspective three-dimensional structural schematic diagram of a material distribution structure of a combustion furnace according to another embodiment of the present application;

FIG. 5 shows a cross-sectional structural schematic diagram of a material distribution structure of another combustion furnace according to an embodiment of the present application;

FIG. 6 shows a schematic structural diagram of another post-combustion furnace according to an embodiment of the present application; and

FIG. 7 shows a schematic flowchart of the operation method of the combustion furnace according to the embodiment of the present application.

Description of the components shown in the attached drawings:

10, the first arm group; 11, the first water pipe; 12, the first refractory layer; 20, the second arm group; 21, the second water pipe; 22, the second refractory layer; 31, the first material passing gap; 32, the second material passing gap; 41, the air inlet; 42, the material inlet; 43, the horizontal plane; 44, the air inlet side wall; 45, the stacking slope line; 46, the discharge conveying mechanism; 47, the air outlet; 48, Exhaust passage; 51, the first water collection tank; 52, the second water collection tank; 53, the third water collection tank; 61, the heat storage device; 611, the ignition body; 612, the heat storage body; 71, the first inlet; 72, Second entrance.

Detailed ways

In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. The embodiments described above are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the embodiments of the present application should fall within the protection scope of the embodiments of the present application.

For ease of understanding, before the description of the solid fuel combustion organization method, the principle and structure of the solid fuel combustion furnace are briefly described as follows:

In this embodiment, the solid fuel can satisfy the temperature field flow in the furnace chamber of the combustion furnace, so as to achieve full combustion of the solid fuel. The process of solid fuel satisfying the temperature field in the furnace hearth is as follows: the spatial distribution of different temperature regions in the furnace hearth meets the temperature conditions required for different combustion stages of solid fuel. Forming.

In order to make the combustion furnace meet the above-mentioned temperature field process, the combustion that conforms to the combination of multiple inherent combustion properties of solid fuel can be realized in the furnace, that is, multi-coupling combustion can be realized. For this purpose, a material distribution structure arranged in the furnace body of the combustion furnace is provided, so that the furnace chamber in the furnace body (the furnace chamber can be the combustion space of solid fuel, which can be at least part of the inner cavity of the furnace body) satisfies the above-mentioned temperature field conditions .

Referring to Figure 1, the combustion furnace includes a furnace body, a material distribution structure and a discharge conveying mechanism 46. The top wall of the furnace body is provided with a feeding port 42, and the material distribution structure is arranged below the feeding port 42 to receive the incoming solid fuel. The material distribution structure is used to form the first inclined plane, and the material distribution structure includes a first material passing gap 31 . The discharge conveying mechanism 46 is used to discharge the combustion residue out of the furnace body.

Below in conjunction with Fig. 1, the combustion organization method of solid fuel is described as follows:

The combustion structure of the solid fuel includes: a first inclined plane disposed on the material distribution structure below the feed port 42 of the combustion furnace provides a guiding force for the solid fuel to move downward, so that the solid fuel moves along the first inclined plane. The solid fuel entering the combustion furnace is screened according to the volume through the first material passing gap 31 of the material distribution structure, so that the solid fuel with a volume larger than the first material passing gap 31 moves along the first inclined plane, and the volume is smaller than the first material passing. The solid fuel in the gap 31 falls through the first material passing gap 31, so that the solid fuel is combusted in an organized manner in the manner of endothermic cracking above the material distribution structure, and burning and releasing heat below the material distribution structure.

By setting the material distribution structure in the combustion furnace, the first inclined plane of the material distribution structure and the first material passing gap 31 can be used to guide and sort the solid fuel, and at the same time, the natural laws of solid fuel combustion in the furnace body (such as in the During the combustion process, the volume of the solid fuel gradually decreases, the gap between the solid fuel gradually decreases, the wind resistance increases, and the fluidity of the solid fuel increases, etc.), so as to realize the orderly and organized combustion of the solid fuel in the combustion furnace. Thus, it is ensured that the solid fuel in the combustion furnace can be continuously, stably and reliably burned.

In one example, the furnace body of the combustion furnace is divided into a cracking area, a fixed carbon combustion area and an anoxic combustion area by a material distribution structure, the cracking area is located above the first slope, and the fixed carbon combustion area and the anoxic combustion area are located at the first below the slope.

Wherein, the material distribution structure may include two or more arm groups, so as to divide the combustion space in the furnace body into the aforementioned cracking area, fixed carbon combustion area and oxygen-deficient combustion area. According to the different output power of the combustion furnace, the volume of the combustion space in the furnace body is different, and the number of arm groups included in the material distribution structure can be different accordingly. If the volume of the combustion space increases, the number of arm groups increases accordingly.

In one case, the combustion furnace further includes a discharge conveying mechanism 46, and the discharge conveying mechanism 46 is, for example, any structure capable of providing thrust for the combustion residues, such as a conveyor belt. The material distribution structure includes a first arm group for forming a first inclined plane and a second arm group for forming a second inclined plane. The top of the first arm group is used to form a cracking area, and the second arm group is located in the first Between the arm group and the discharge conveying mechanism 46, a fixed carbon combustion zone is formed between the first arm group and the second arm group, and an oxygen-deficient combustion is formed between the second arm group and the discharge conveying mechanism 46 Area. After the solid fuel enters the furnace body from the feed port 42, with the collapse caused by the combustion of the solid fuel and the burning residue is discharged from the furnace body by the discharge conveying mechanism 46, the solid fuel above gradually moves downward, and in the downward direction In the process of moving, it passes through the cracking area in turn (the pyrolysis area is pyrolyzed and volatiles, water vapor, etc. are released), from the cracking area to the fixed carbon combustion area (the fixed carbon in the solid fuel is burned in this area), from The fixed carbon combustion zone enters the anoxic combustion zone (anoxic combustion is performed in the anoxic combustion zone), and is finally pushed out of the furnace body.

Of course, in another case, the material distribution structure may only include the first arm group 10, a cracking area is formed above the first arm group 10, and a fixed carbon combustion area and an oxygen-deficient area are formed below the first arm group 10 burning area.

It should be noted that the cracking area refers to the area in which the volatile matter in the solid fuel is cracked and the specific gravity released is the largest, so this area is called the cracking area, but it is not excluded that the solid fuel will also be burned in this area. It is also not restricted that the solid fuel can only be cracked in this area. Similarly, the fixed carbon combustion zone refers to the area in which the solid fuel mainly undergoes fixed carbon combustion, but does not exclude the simultaneous pyrolysis of volatiles. Similarly, in the anoxic combustion zone, the solid fuel is mainly subjected to anoxic combustion, but the pyrolysis of volatile components is not excluded.

The structure of the combustion furnace is described as follows:

According to an embodiment of the present application, a solid fuel combustion furnace is provided, which includes a furnace body, a material distribution structure, and a discharge conveying mechanism 46. The top wall of the furnace body is provided with a feeding port 42, and the air inlet side wall 44 of the furnace body is provided with a feeding port 42. The upper part is provided with an air inlet 41; the material distribution structure includes a first arm group 10 forming a first slope, and the first arm group 10 is arranged below the feed port 42 for receiving the solids entering the furnace body from the feed port 42 Fuel, there is a first included angle α between the first inclined plane and the horizontal plane 43 , and the first included angle α is smaller than the stacking gradient γ of the fuel stack formed by the solid fuel stacking on the first arm group 10 , and the first arm group 10 A first material passing gap 31 is provided on the upper part, so that the solid fuel can be dropped through the first material passing gap 31; the discharge conveying mechanism 46 is arranged at the bottom of the furnace body to carry the solid fuel dropped from the material distribution structure, and The combustion residue of the combustion furnace is discharged from the furnace body.

In this embodiment, the first support arm group 10 of the material distribution structure forms a first inclined plane, and is provided with a first material passing gap 31 . This structure screens the solid fuel, so that the solid fuel with a larger volume stays above the first arm group 10, and the solid fuel with a smaller volume falls through the first material passing gap 31, so that the solid fuel with a larger volume is dropped. The staying time in the furnace body is longer, while the solid fuel with smaller volume stays in the furnace body for a relatively shorter time, thereby realizing the control of the burning time of different volumes of solid fuel. In addition, the first arm group 10 is matched with the upper feed and the upper air inlet, so that the solid fuel above the first arm group 10 can obtain sufficient oxygen supply, so as to maintain stable and sufficient combustion of the solid fuel to ensure the combustion furnace. The operation is stable and reliable, and the phenomenon of fire failure is prevented.

The discharge conveying mechanism 46 conveys the combustion residue to the outside of the furnace, and the collapse of the fuel stack caused by the combustion of the solid fuel forms the power for the downward movement of the solid fuel, so that the solid fuel is continuously replenished into the furnace body and continuously and reliably carried out in the furnace body. to burn.

As shown in FIG. 1 , the stacking gradient γ (also known as stacking gradient) is a stable gradient formed by the natural stacking of solid fuel on the first arm group 10 . Different types of fuels, such as biomass and lignite, usually have different stacking slopes γ due to their inherent characteristics such as particle size. The stacking gradient γ can be expressed as the angle between the stacking gradient line 45 and the horizontal plane 43 .

The solid fuel in this embodiment can be any solid that can burn and generate heat, including but not limited to: biomass fuel, bituminous coal, lignite and coal ash, garbage and sludge, and the like. The combustion furnace generates heat by burning solid fuel, so as to realize the functions of outputting steam or generating electricity.

In an example, the furnace body includes a top wall, an air inlet side wall 44 and an air outlet side wall, and the like. The top wall is provided with a feeding port 42 , the upper part of the air inlet side wall 44 is provided with an air inlet 41 , and the air outlet side wall is formed with an air outlet 47 .

Optionally, the top wall of the furnace body is also provided with a first inlet 71 for entering the first supplementary fuel whose bulk density is less than or equal to the first set value, and the distance between the first inlet 71 and the air inlet 41 is smaller than that of the feed inlet 42 The distance from the air inlet 41.

Among them, the bulk density can refer to the weight of the object per unit volume. Usually the bulk density is used to describe the fluid. Taking dust as an example, since the particles of dust are relatively dispersed, the bulk density of dust is small, while the bulk density of sludge is relatively large. According to different needs, the first set value can be set to an appropriate value.

The bulk density of the first supplementary fuel (eg, dust, coal ash, garbage, etc.) is less than or equal to the first set value. The first set value of the above-mentioned fuels with different particle sizes can be determined according to experience or a combustion test.

Since the bulk density of these first supplementary fuels is relatively small, it is easier to be carried and moved by the airflow, so the first inlet 71 is arranged between the air inlet 41 and the feed inlet 42, so that the first supplementary fuels such as dust, coal ash and Such fuel such as garbage falls on the stacking slope of the fuel stack toward the air inlet 41, and will not be directly blown into the exhaust passage by the airflow. The first supplementary fuel falling on the fuel stack is ignited and burned by the solid fuel, and gradually moves downward as the fuel stack collapses, and finally the residual combustion residue is discharged from the furnace body along with the combustion residue.

Similarly, the top wall of the furnace body is also provided with a second inlet 72 for entering the second supplementary fuel with a volume larger than the first set value. The distance of the tuyere 41 .

Wherein, the second supplementary fuel with a volume larger than the first set value is, for example, sludge, etc. The combustion furnace in this embodiment can burn sludge with a water content less than or equal to 80%. Since the bulk density of the sludge is relatively large, it is not easily affected by the airflow, so the second inlet 72 is arranged between the feed inlet 42 and the air outlet 47, so that the sludge enters the furnace body and falls to the far away air inlet of the fuel pile. On the stacking slope of 41, since the distance between the side slope and the first end of the first arm group 10 is relatively close, the temperature here is higher than that at other positions, and it is easier to dry the sludge and remove it. Ignition and therefore higher reliability of sludge treatment, making it possible to burn sludge with a higher water content.

In one embodiment, in order to facilitate the delivery of the second supplemental fuel into the second inlet 72, the burner may further include an auger. For example, the screw pusher may include a rotating shaft and a plurality of sets of helical blades fixedly connected with the rotating shaft, and the helical blades may be evenly distributed in the rotation plane of the rotating shaft. The screw pusher is fixed on the top wall of the furnace body, and the screw pusher includes a sludge outlet. The sludge outlet is provided above the second inlet 72 so that the second inlet 72 receives sludge discharged from the sludge outlet. The input speed and conveying volume of sludge can be easily controlled by setting the screw feeder to ensure that the sludge can be fully treated.

The combustion furnace can not only realize the stacking combustion of solid fuel, but also can use the combustion furnace leaves, plastic bags, droplets, dust, garbage and sludge that have not been pretreated at the same time during the combustion process of the combustion furnace. Reduce the treatment cost of solid waste such as garbage and sludge. Moreover, compared with the discharge conveyor mechanism furnace, since the fuel in the discharge conveyor mechanism furnace can only be laid on the discharge conveyor mechanism, limited by the area of the discharge conveyor mechanism, the solid fuel furnace burning the same volume can provide the same amount of heat. The high-value exhaust furnace requires a larger volume, and the solid fuel in the combustion furnace is more, so it can provide a larger calorific value in a smaller space, so as to achieve the combustion of sludge with a particularly high water content, and Combustion can be achieved without pretreatment of sludge, garbage, dust, etc., thereby greatly saving equipment and costs for pretreatment of the first supplementary fuel and the second supplementary fuel.

For the first supplementary fuel and/or the second supplementary fuel entering the furnace body, the moisture therein is evaporated under the combustion of the solid fuel, and then ignited, and burns together with the solid fuel. The solid combustion is screened and sorted by the material distribution structure in the furnace body, so as to achieve organized and orderly combustion.

Wherein, the material distribution structure can be the first arm group 10, and the first arm group 10 is used to form the first inclined plane and the first material passing gap 31. The first end of the first arm set 10 is lower than the second end thereof to form a first inclined plane, and the distance between the second end of the first arm set 10 and the air inlet side wall 44 is smaller than the distance between the feed inlet 42 and the inlet side wall 44 . The distance between the air inlet side walls 44 ensures that the solid fuel can smoothly move downward along the first slope after entering. The first arm group 10 can take any suitable form and structure as long as it can realize the sorting and screening of solid fuel.

For example, the first support arm group 10 may include a plurality of parallel first support arms, each first support arm is made of refractory material, and a first material passing gap 31 is formed between two adjacent first support arms. The structure and shape of the first arm can be determined according to actual needs.

For another example, the first arm may be the first water pipe 11 . The material distribution structure can also include a first water collection tank 51 and a second water collection tank 52, the first water collection tank 51 is connected to the first end (the end at the bottom) of the first arm group 10, and communicates with the first water pipe 11, The second water collecting tank 52 is connected to the second end (the upper end) of the first arm set 10 and communicated with the first water pipe 11, so that water can be introduced into the first arm set 10, and the water can be used for cooling and cooling. Protection to prevent the first arm group 10 from being burned.

Preferably, a first refractory layer 12 can be sleeved outside the first water pipe 11 , the width W of the first material passing gap 31 can be adjusted by the first refractory layer 12 , and the first refractory layer 12 can further protect the first water pipe 11 . When the burner burns different solid fuels, different first refractory layers 12 can be replaced.

In order to facilitate disassembly and replacement of the first refractory layer 12 , the first water pipe 11 may be provided with a plurality of limiting protrusions, and the first refractory layer 12 may be provided with a plurality of limiting grooves. When the first refractory layer 12 is arranged on the first water pipe 11, the limit protrusions cooperate with the limit grooves to prevent the first refractory layer 12 from falling, and the first refractory layer 12 can be easily removed from the first water pipe during replacement. 11 to remove.

The lengths of the limiting protrusions on the first water pipe 11 may be the same or different, so as to meet different requirements.

In order to prevent the solid fuel from being stuck at the first arm group 10 and form a burning dead zone, the upper edge of the second end of the first water pipe 11 is flush with the upper edge of the second water collecting tank 52, so that the solid fuel can slide down smoothly .

Optionally, the second end of the first arm group 10 may also be equipped with an adjustment baffle, which is used to control whether the solid fuel can pass through the second end, so as to adapt to the combustion of different solid fuels in the combustion furnace. The adjusting baffle can be rotatably connected to the second end of the first arm group 10 through pins, etc., so that when the solid fuel needs to pass through the second end, the adjusting baffle can be lowered so that it can fall through the second end; otherwise , and when not needed, raise the adjusting baffle to prevent the solid fuel from falling through the second end.

Alternatively, the adjusting baffle can also be movably connected to the furnace body through a telescopic rod, etc., when the solid fuel does not need to fall through the second end, the adjusting baffle can be pushed to close the opening between the second end and the furnace body; The adjustment flap is pulled out of the opening when the solid fuel is required to drop through the second end.

In this embodiment, in addition to the first support arm set 10, the material distribution structure may also include a second support arm set 20 for forming the second inclined plane, and the second support arm set 20 is located between the first support arm set 10 and the second support arm set 20. Between the discharging and conveying mechanisms 46 , the second arm group 20 has a second feeding gap 32 , and the width of the second feeding gap 32 is smaller than the width of the first feeding gap 31 .

By arranging the second arm set 20, which cooperates with the first arm set 10, a fixed combustion area is formed between the second arm set 20 and the first arm set 10, and the second arm set 20 and the discharge conveyance An oxygen-deficient combustion zone is formed between the mechanisms 46 . The second arm group 20 can sort and guide the solid fuel below the first arm group 10 , so that even when the furnace body has a large volume and a large amount of solid fuel, it can be fully burned without overburning.

The second arm set 20 can be connected to the first arm set 10 or the first water collecting tank, such as by welding, screw connection, etc., or can also be integrally formed with the first arm set 10 or the first water collecting tank , such as processing by casting, bending, etc.

Optionally, in order to ensure the time of the solid fuel in the fixed carbon combustion zone, the distance L1 between the second end of the first arm set 10 and the air inlet side wall 44 is greater than the distance L1 between the second end of the second arm set 20 and the air inlet side wall 44 . The distance L2 between the air inlet side walls 44 can make the solid fuel burn more fully in the solid carbon combustion zone.

The structure of the second arm set 20 may be the same as or different from that of the first arm set 10 . For example, the second support arm group 20 includes a plurality of second support arms, and a second material passing gap 32 is formed between two adjacent second support arms.

The second support arm can be a support arm made of refractory material, which can ensure the performance of the second support arm group 20 and ensure the service life.

Alternatively, the second arm may also be the second water pipe 21 . If the second arm is the second water pipe 21, the material distribution structure further includes a third water collecting tank 53, and the first end of the second arm group 20 is connected to the first water collecting tank 51, so as to realize the connection with the first arm group 10 The first end of the second arm set 20 is connected to the third water collecting tank 53, so that water can be introduced into the second arm set 20 to cool and protect it and prevent it from being burned.

Optionally, a second refractory layer 22 can be sleeved outside the second water pipe 21 , and the width of the second material passing gap 32 can be adjusted through the second refractory layer 22 , and the second water pipe 21 can be further protected.

In order to prevent the solid fuel from being stuck at the second arm group 20 and form a burning dead zone, the upper edge of the second end of the second water pipe 21 is flush with the upper edge of the third water collecting tank 53, so that the solid fuel can slide down smoothly .

There is a discharging distance L3 between the second end of the second arm group 20 and the discharging conveying mechanism 46, and the discharging distance is negatively correlated with the specific gravity of volatile matter in the combustion residue in the furnace body. Since the length of the second arm group 20 is fixed once the processing is completed, the clamp between the second inclined plane and the horizontal surface 43 can be adjusted by adjusting the discharging distance L3 between the second arm group 20 and the discharging conveying mechanism 46 angle, and then adjust the time that the solid fuel stays in the fixed carbon combustion zone, so as to control the proportion of volatile matter in the combustion residue, and then control the quality of carbon in the combustion residue. This is because the carbon quality in the combustion residue is mainly related to the degree of volatilization of the volatile matter and the degree of anoxic combustion. The less volatile matter, the better the quality of the carbon in the combustion residue.

When the combustion space of the furnace body is too large, in order to ensure the full combustion of the solid fuel, the material distribution structure may also include at least one third arm group, the number of the third arm group is multiple, and each third arm group All have a third feeding gap, and along the feeding direction of the feeding conveying mechanism, the third feeding gaps of the plurality of third arm groups gradually decrease.

The structure and shape of the third arm group may be the same as or different from those of the first arm group 10 , which will not be repeated in this embodiment. The number of the third arm group can also be selected according to requirements.

During the combustion of solid fuel, since the solid fuel will release volatile matter in the cracking area, and will generate carbon monoxide, etc., in order to treat the volatile matter economically and efficiently, thereby reducing the cost of clean emissions, the furnace body is also provided with a for A heat storage device 61 for storing the heat generated by the combustion of solid fuel, the heat storage device 61 is used to form a heat storage cavity 48 in the furnace body, and maintain the temperature of at least part of the area in the heat storage cavity 48 at 800°C to 1150°C , to form a stable temperature field. Figure 1 only shows a section of the heat storage device.

In an example, the heat storage cavity 48 is communicated with the air outlet 47, and in order to ensure that the volatile matter in the gas generated by the solid fuel will not escape without treatment, the height of the air outlet 47 is lower than the height of the air inlet 41, Moreover, this can also provide sufficient oxygen for the solid fuel.

Optionally, the heat storage device 61 includes an ignition body 611 and a heat storage body 612, and the distance between at least part of the ignition body 611 and the first end of the first arm group 10 is less than or equal to a set distance threshold, so that the ignition body 611 At least a portion of it is located in the outer flame zone of the carbon flame.

The ignition body 611 is used to absorb the heat of the carbon flame, thereby heating the passing gas to burn the combustible gas in the gas. The heat storage body 612 is located above the ignition body 611, and is used to form the heat storage cavity 48 in cooperation with the ignition body 611. At the same time, the heat storage body 612 absorbs the heat generated by the combustion of the gas, so as to cooperate with the ignition body 611 to form the heat storage cavity 48 The temperature field is stably maintained at 800°C to 1150°C, which avoids the problem of insufficient treatment of volatile matter and dioxin in the gas caused by lower than 800°C, and does not cause oxidizing air when it exceeds 1200°C. nitrogen, causing nitrogen oxide emissions to exceed the standard. In addition, the volume of the temperature field should be such that the gas stays in the temperature field for a sufficient time to ensure that volatiles, etc., are adequately treated.

In addition, the ignition body 611 and the heat storage body 612 can also adjust the temperature in the heat storage cavity to peak, so as to adapt to solid fuels with different moisture content, so as to ensure that VOCs and the like can be treated reliably.

In this embodiment, the ignition body 611 and the heat storage body 612 can be made of refractory cement or other materials, but this is not limited, and they can also be made of other materials, as long as the heat storage can maintain the temperature field at 800°C to 1150°C. .

Preferably, the heat storage per unit volume of the ignition body 611 and the heat storage body 612 is greater than the heat storage heat per unit volume of the furnace body.

In addition, an air supply port may be provided on the thermal storage body 612 as required, so as to supply oxygen into the thermal storage cavity 48 when oxygen supply is required.

By arranging the heat storage device 61, the exhaust gas is treated with the heat of the combustion of the solid fuel, the purpose of clean emission is achieved, and the cost of exhaust gas treatment and emission is saved.

The working process and principle of the combustion furnace are described below in conjunction with the aforementioned structure:

In one example, the material distribution structure includes a first arm set 10 and a second arm set 20 . Of course, in other examples, according to the power of the combustion furnace, the material distribution structure may be set to include more than two second arm groups 20, for example, three arm groups, which is not limited.

As shown in FIG. 2 , the first support arm group 10 has a first inclined surface and a first material passing gap 31 , the first support arm group 10 is arranged below the feed opening, and the first end of the first support arm group 10 (in the The height of the end away from the air inlet side wall 44 in FIG. 2 is lower than the height of the second end of the first arm group 10 (the end close to the air inlet side wall 44 in FIG. 2 ). The distance between the second end of 10 and the air inlet side wall of the furnace body is less than or equal to the distance between the feed port and the air inlet side wall.

The second arm set 20 is located below the first arm set 10 , and the height of the first end (the end away from the air inlet side wall 44 ) of the second arm set 20 is higher than the second end of the second arm set 20 (near the end of the air inlet side wall 44 ), the second arm group 20 has a second inclined surface and a second material passing gap, and the width of the second feeding gap is smaller than the width of the first feeding gap 31 .

In this example, the top of the first arm group 10 is a cracking area, and the solid fuel absorbs heat in this area, and the combustible gas therein is released due to cracking, and the moisture therein is also evaporated.

A fixed carbon combustion zone may be formed between the first arm set 10 and the second arm set 20, and the fixed carbon in the solid fuel is burned and released when the solid fuel is in the zone. Since there are more solid fuels in the fixed carbon combustion zone in the stacker burner, it can provide enough heat to the solid fuel in the pyrolysis zone to ensure that even if the solid fuel entering the furnace has a high humidity, there is sufficient heat to dry it , so that the stack burner can adapt to solid fuels of different humidity. While improving the adaptability, it does not need to preprocess the solid fuel, which saves costs, and does not require complex sensors for detection and complex control. The reliability is greatly improved and the failure rate is reduced.

An oxygen-deficient combustion zone is formed between the second arm set 20 and the discharge conveying mechanism 46. When the solid fuel is in this zone, the gap between the solid fuels is relatively small because the solid fuel is far away from the air inlet 41 and the volume is relatively small. The oxygen supply is less and the airflow velocity is lower, and the reduced airflow velocity will make the temperature of the oxygen-deficient combustion zone lower, thus solving the problem of easy overburning and coking in the existing spread-burning furnace. The combustion furnace in the embodiment of the present application utilizes the inherent characteristics of the gradually decreasing volume of the solid fuel and the gradually increasing fuel gap during the combustion process, so as to realize the automatic adjustment of the wind resistance at different positions in the furnace body, so as to automatically prevent the solid fuel from overheating. burn.

In order to facilitate understanding, the operation process and principle of the combustion furnace are briefly described as follows:

The operation process of the combustion furnace can be divided into several stages of filling, ignition and operation.

In the filling stage, the solid fuel enters from the feed port 42 and gradually falls and accumulates to form a fuel pile. The fuel pile naturally forms a stacking slope γ. The fuel pile is schematically shown in FIG. Therefore, the stacking slope formed by the accumulation of solid fuel everywhere in the furnace body is similar. When the solid fuel accumulates to the first material level P of the feeding port 42, the feeding is stopped and is ready to be ignited.

In the ignition stage, close the air inlet 41, open the induced draft fan connected to the air outlet 47 (the induced draft fan communicates with the air outlet 47 through the channel), and put the ignition material at the inlet 42, and the furnace is under the action of the induced draft fan. The body is in a negative pressure state, and the air flow enters from the feed port 42, so that the solid fuel is ignited by the pilot, and the solid fuel is ignited for a period of time (the time can be determined in an appropriate manner according to needs) and then enters the operation stage.

In the operation stage, the material level of the feed port 42 is kept at the second material level, and the second material level is higher than the first material level, and the air inlet 41 is opened to allow the airflow to enter from the air inlet 41, and when running for a period of time The discharging conveying mechanism 46 is activated, so that the discharging conveying mechanism 46 pushes the solid fuel to move toward the discharging port, wherein the moving direction of the discharging conveying mechanism 46 is the direction away from the air inlet 41 .

In this stage, due to the continuous combustion of the solid fuel, the fuel stack in the furnace body is continuously collapsed, and the discharge conveying mechanism 46 continuously drives the combustion residue to move toward the outside of the furnace. The solid fuel at the furnace can continue to fall downwards to realize the replenishment of new solid fuel into the furnace body.

Due to the large amount of solid fuel in the furnace, the solid fuel in the burning state is sufficient, which can provide enough heat to dry the newly entered solid fuel, and can satisfy the heat absorbed by the newly entered solid fuel to be ignited. This ensures the adaptability to solid fuels of different humidity, and ensures that the burner can burn smoothly and stably without the need for complex sensors for inspection and control.

The solid fuel entering the feed port 42 first absorbs heat in the cracking area and releases some gases (including but not limited to VOC, dioxin and water vapor, etc.), and the volume of the solid fuel will also decrease during this process. These released gases are carried by the airflow into the heat storage cavity 48 formed by the heat storage device 61 , and are processed in the heat storage cavity 48 . Due to the setting of the heat storage device 61 and its sufficient heat storage capacity, it is ensured that it can adapt to gases of different temperatures, and it is ensured that the VOC (ie, volatile organic compounds, English full name is volatile organic compounds) in the gas can be fully carried out. deal with.

When the solid fuel reaches the first slope of the first support arm group 10 of the material distribution structure from the feed port 42 , the solid fuel with a volume smaller than the first material passing gap 31 can pass through due to the blocking effect of the first support arm group 10 . The first arm set 10 enters the fixed carbon combustion zone. For the solid fuel whose volume is larger than the first material passing gap 31, it will move downward along the first slope and gradually move to the first end of the first arm group 10 (that is, the one shown in the figure that is far from the air inlet side wall 44). In this process, the solid fuel can still absorb heat for cracking and evaporation of water. If the solid fuel moves to a temperature range where the temperature field is higher than the ignition point of the fuel, the solid fuel will be ignited and start to burn.

Along with the cracking, water evaporation and combustion of the solid fuel, the volume of the fuel is also continuously reduced until it is burned enough to fall through the first material passing gap 31 and enter the fixed carbon combustion zone.

Some solid fuels contain non-flammable and relatively large components. Since the volume of these components will not decrease, they will move along the first inclined plane to the first end of the first arm group 10, and then drop to the hypoxia. The combustion zone is transported to the discharge port and discharged from the furnace body with the collapse of the solid fuel in the oxygen-deficient combustion zone and the push of the discharge conveying mechanism 46 . This makes the combustor extremely adaptable to solid fuels, and is also compatible with solid fuels doped with incombustibles, and it is guaranteed not to be stuck due to the presence of incombustibles.

Due to the blocking effect of the first arm group 10, there is a speed difference between the speed at which the solid fuel volume below the first arm group 10 collapses and the falling speed of the solid fuel above the first arm group 10. A gap 90 for air to pass through is formed under the first arm group 10 , due to the existence of the gap 90 , the air entering from the air inlet 41 can quickly move from the gap 90 to the first end of the first arm group 10 , due to the stacking slope γ formed by the solid fuel accumulated on the first arm group 10 and the existence of the first included angle α between the first arm group 10 and the horizontal plane, the first arm group 10 has a first The thickness of the solid fuel at the end is the smallest, and the gap between the solid fuels is large, which makes the wind resistance there smaller, which in turn makes the airflow velocity larger, and the airflow velocity is positively correlated with the temperature. The temperature at the first end of the arm set 10 is relatively high, and this area is also the area where the carbon flame generated by the combustion of the solid fuel is located, which can sufficiently provide heat for the ignition body 611 to help it maintain a stable temperature field.

For the solid fuel that falls into the fixed carbon combustion area, since this area is close to the air inlet 41, and the cold air entering from the air inlet 41 will sink first, this part of the solid fuel can obtain sufficient oxygen supply to burn , as the volume of the burning solid fuel decreases, the gap between the solid fuel going down is smaller, the wind resistance is larger, the wind speed is smaller and the temperature is lowered, so the solid fuel will not appear coking phenomenon, thus effectively It solves the problem that the solid fuel is easy to coke and cause blockage when the grate furnace in the prior art is burned when the coking temperature is below the ignition point.

Due to the volume reduction of the solid fuel caused by the combustion, combined with the pushing action of the discharge conveying mechanism 46, the solid fuel continuously moves downward. When a part of the solid fuel moves to the second slope of the second arm group 20, if it can pass through the second material passing gap 32 of the second arm group 20, it will enter the oxygen-deficient combustion area from the fixed carbon combustion area; if If the volume is not enough to pass through the second material passing gap 32, it will move down along the second slope until it can pass through the second material passing gap 32, or move to the second end of the second arm group 20 and fall down, it will It is pushed to the oxygen-deficient combustion zone by the discharge conveying mechanism 46 .

In this process, due to the blocking effect of the solid fuel fuel stack itself, the air supply in the furnace belongs to the surface air supply, and the airflow speed is controlled by the gap between the solid fuels, so that the combustion volume of the solid fuel is reduced, while the The characteristics of reducing the gap and reducing the wind speed naturally control the combustion of the solid fuel, preventing the phenomenon of insufficient combustion in some parts and over-combustion in the other part.

By adjusting the length of the second arm group 20 and the distance between the second end of the second arm group 20 and the air inlet side wall 44, the time that the solid fuel stays in the fixed carbon combustion zone can be controlled, thereby controlling the residual combustion The fixed carbon content in the material, so as to achieve the purpose of obtaining carbon of the required quality. For example, biomass fuel can be processed into carbon through the stack furnace, and the heat generated during the combustion process can also be used to generate electricity.

Since the oxygen-deficient combustion zone is far away from the air inlet 41 and the gap between the solid fuels is also small, the wind resistance here is high and the airflow velocity is low, so coking will not occur, and the oxygen supply is also small. , which can avoid over-burning, thereby preventing excessive nitrogen oxide emissions due to oxidizing nitrogen in the air.

Similar to the first arm set 10, due to the blocking effect of the second arm set 20, a gap 90 is also formed below the second arm set 20, and the gap 90 enables the burning carbon flame to be collected to the first arm. at the first end of the arm set 10 .

The process of the solid fuel passing through the third arm group in the oxygen-deficient combustion zone is similar to the process of passing through the first arm group 10 and the second arm group 20 , so it is not repeated here. The number of the third arm group can be set as required, or it can also not be set.

The combustion furnace solves the problem that the fuel of the existing grate furnace is spread on the grate during operation. In order to ensure that the fuel can be fully burned and prevent insufficient combustion caused by insufficient local oxygen supply, The thickness of the fuel can not be too high, usually the thickness of the fuel can only be a few tens of centimeters.

Since the solid fuel can be burned in a heap, the problem of insufficient adaptability of the grate furnace to the change of moisture in the new fuel is solved, and the change of the moisture content in the newly added solid fuel can be better adapted.

Further, in order to improve the reliability of the operation of the grate furnace in the existing grate furnace, it is necessary to set a large number of sensors around the grate to detect the temperature at the grate, so as to control the air supply to the fuel, resulting in increased production costs, and The problems of complex control logic, reduced reliability, and because the grate is point-supplied (wind blown out by a fan) or line-supplied (wind blown out by a row of fans), it is easy for fuel to appear locally. Insufficient combustion and another phenomenon of local over-combustion.

In addition, it also solves the problem that the output power of the grate furnace is positively correlated with the area of the grate. If a higher output power is required, a larger area of the grate is required, which further increases the production cost.

The combustion furnace in the embodiment of the present invention can meet the above-mentioned temperature field process in the furnace, that is, the spatial distribution of different temperature regions in the furnace meets the temperature conditions required by different combustion stages of solid fuel, and realizes multiple inherent combustion of solid fuel in the furnace. Combustion that combines these inherent combustion properties with each other, that is, multi-factor coupled combustion of multiple combustion properties. Several of the inherent combustion properties of the solid fuels described above include:

1. The combustion process of solid fuel is a process of first absorbing heat and then releasing heat. By making the heat capacity (that is, the fuel enthalpy value) of the fuel in the furnace greater than the heat absorption required for combustion, the embodiments of the present invention can ensure that the heat absorption required before the solid fuel is burned, thus ensuring that the combustion furnace can be stably and continuously The ground burns without breaking the fire.

2. The volume of solid fuel changes from large to small during the combustion process, so that the stacking slope of the solid fuel gradually decreases, the fluidity increases, the gap between the solid fuel gradually decreases, and the ventilation rate gradually decreases.

3. Gravity change of solid fuel during combustion.

In consideration of the above-mentioned multiple coupling factors, the present application makes the solid fuel combust in an organized manner in the combustion furnace through the combustion furnace with the material distribution structure.

Optionally, a feasible operation method of the combustion furnace of the present application is as follows:

The method includes:

Step S102: Fill the furnace body of the combustion furnace with solid fuel to the first filling position, and make the solid fuel pile up in the furnace body to form a fuel pile.

Step S104 : close the air inlet 41 , start the induced draft fan connected to the combustion furnace, and put a pilot material at the feed port 42 , so that the pilot material ignites the solid fuel.

Step S106 : when the solid fuel is burned for the first set period of time, the air inlet 41 is opened, and the material level of the solid fuel is kept at the second filling position, which is higher than the first filling position.

By this method, the combustion furnace can be started and moved stably and reliably, so as to realize the automatic, reliable and stable combustion of the solid fuel.

Preferably, in order to ensure the stable operation of the combustion furnace and make the combustion residue meet the requirements, the method further includes step S108.

Step S108: When the solid fuel burns for the second set time period, start the discharging conveying mechanism 46, so that the discharging conveying mechanism 46 pushes the combustion residue dropped on it to move the discharging conveying mechanism to the discharging port of the furnace body. .

By controlling the movement of the discharging conveying mechanism 46, the discharging conveying mechanism 46 can provide power for the solid fuel and/or combustion residue in the lower part of the furnace body, and drive it to move to the discharging port of the furnace body. At the same time, due to the driving action of the discharge conveying mechanism 46 , a gap is formed below the first arm set 10 and the second arm set 20 , which helps to increase the carbon flame temperature at the first end of the first arm set 10 .

Optionally, in order to be able to process the first supplementary fuel when needed, the method further includes step S110.

Step S110: Load the first supplementary fuel with a bulk density less than or equal to the first set value through the first inlet 71 of the combustion furnace, and make the fuel stack burn the first supplementary fuel. Through this step, the first supplementary fuel (such as dust, garbage, etc.) can be transported into the combustion furnace for combustion treatment, which not only fully utilizes the calorific value of the first supplementary fuel, but also realizes waste treatment.

Optionally, in order to be able to process the second supplementary fuel when needed, the method further includes step S112.

Step S112: Load the second supplementary fuel with a volume greater than the first set value through the second inlet 72 of the combustion furnace, and cause the fuel stack to burn the second supplementary fuel. Through this step, the second supplementary fuel (such as sludge, etc.) can be transported into the combustion furnace for combustion treatment, which not only fully utilizes the calorific value of the first supplementary fuel, but also realizes waste treatment.

It should be understood that although this specification is described according to various embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

The above descriptions are only illustrative specific implementations of the embodiments of the present application, and are not intended to limit the scope of the embodiments of the present application. Any equivalent changes, modifications and combinations made by any person skilled in the art without departing from the concept and principles of the embodiments of the present application shall fall within the protection scope of the embodiments of the present application.

Claims

A kind of combustion organization method of solid fuel, is characterized in that, comprises:

The first inclined plane formed by the material distribution structure disposed below the feed opening of the combustion furnace provides the solid fuel with a guiding force to move downward, so that the solid fuel moves along the first inclined plane;

The solid fuel entering the combustion furnace is screened according to the volume through the first material passing gap of the material distribution structure, so that the solid fuel whose volume is larger than the first material passing gap moves along the first inclined plane, The solid fuel whose volume is smaller than the first material passing gap is dropped through the first material passing gap, so that the solid fuel is endothermic cracked above the material distribution structure, and burned and released below the material distribution structure. Tissue burning.
The method according to claim 1, wherein the material distribution structure divides the furnace body of the combustion furnace into a pyrolysis area, a fixed carbon combustion area and an oxygen-deficient combustion area, and the pyrolysis area is located in the first combustion area. Above the slope, the fixed carbon combustion zone and the anoxic combustion zone are located below the first slope.
The method according to claim 2, wherein the combustion furnace further comprises a discharge conveying mechanism, and the material distribution structure comprises a first arm group for forming the first inclined plane and a second arm group for forming the second inclined plane. The second arm group on the inclined plane, the upper part of the first arm group is used to form the cracking area, the second arm group is located between the first arm group and the discharge conveying mechanism, and the The fixed carbon combustion zone is formed between the first arm set and the second arm set, and the oxygen-deficient combustion zone is formed between the second arm set and the discharge conveying mechanism.
A kind of combustion furnace of solid fuel, is characterized in that, comprises:

a furnace body, the top wall of the furnace body is provided with a feeding port, and the upper part of the air inlet side wall of the furnace body is provided with an air inlet;

A material distribution structure, the material distribution structure includes a first support arm group forming a first inclined plane, the first support arm group is arranged below the feed port, and is used to accept the entry into the furnace from the feed port The solid fuel in the body has a first included angle between the first inclined plane and the horizontal plane, and the first included angle is smaller than the stacking slope of the fuel stack formed by stacking the solid fuel on the first arm group, and The first support arm group is provided with a first material passing gap, so that the solid fuel can fall through the first material passing gap; and

A discharge conveying mechanism, which is arranged at the bottom of the furnace body, is used to carry the solid fuel dropped from the material distribution structure, and discharges the combustion residue of the combustion furnace out of the furnace body .
The combustion furnace according to claim 4, wherein the top wall of the furnace body is further provided with a first inlet for entering the first supplementary fuel whose bulk density is less than or equal to the first set value, and the first inlet is provided on the top wall of the furnace body. The distance between the inlet and the air inlet is smaller than the distance between the feed inlet and the air inlet.
The combustion furnace according to claim 4 or 5, wherein the top wall of the furnace body is further provided with a second inlet for entering the second supplementary fuel with a capacity greater than the first set value, and the second inlet is further provided on the top wall of the furnace body. The distance between the second inlet and the air inlet is greater than the distance between the feed inlet and the air inlet.
The combustion furnace according to claim 6, wherein the second supplementary fuel with a bulk density greater than the first set value comprises sludge, and the combustion furnace further comprises an auger, the auger The feeder is fixed on the top wall of the furnace body, and the screw pusher includes a sludge outlet, and the sludge outlet is arranged above the second inlet, so that the second inlet receives the feeder from the furnace. The sludge discharged from the sludge outlet.
The combustion furnace according to claim 4, characterized in that, the combustion furnace further comprises an exhaust passage and an air outlet for discharging the gas generated by the combustion of the solid fuel, and the air outlet is located on the side of the exhaust passage. At the rear, the height of the air outlet is lower than the height of the air inlet.
The combustion furnace according to claim 4, wherein the furnace body is further provided with a heat storage device for storing the heat generated by the combustion of the solid fuel, and the heat storage device is used for storing the heat in the exhaust passage. A temperature field with a temperature maintained at 800°C to 1150°C is formed.
The combustion furnace according to claim 4, wherein the material distribution structure further comprises a second arm group for forming a second inclined plane, and the second arm group is located between the first arm group and the Between the discharge conveying mechanisms, the second arm group has a second material passing gap, and the width of the second feeding gap is smaller than the width of the first feeding gap.
The combustion furnace according to claim 10, wherein the combustion furnace further comprises a third arm group, the number of the third arm group is multiple, and each of the third arm groups has The third feeding gap, along the feeding direction of the feeding conveying mechanism, the third feeding gaps of the plurality of the third arm groups gradually decrease.
The combustion furnace according to claim 10, characterized in that, there is a discharge distance between the second end of the second arm group and the discharge conveying mechanism, and the discharge distance and the furnace body The proportion of volatile matter in the combustion residue is negatively correlated.